502 lines
14 KiB
Vue
502 lines
14 KiB
Vue
<template>
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<Transition
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:enterActiveClass="defaultStore.state.animation ? $style.transition_fade_enterActive : ''"
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:leaveActiveClass="defaultStore.state.animation ? $style.transition_fade_leaveActive : ''"
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:enterFromClass="defaultStore.state.animation ? $style.transition_fade_enterFrom : ''"
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:leaveToClass="defaultStore.state.animation ? $style.transition_fade_leaveTo : ''"
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mode="out-in"
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>
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<MkLoading v-if="fetching"/>
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<MkError v-else-if="error" @retry="init()"/>
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<div v-else-if="empty" key="_empty_" class="empty">
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<slot name="empty">
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<div class="_fullinfo">
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<img :src="infoImageUrl" class="_ghost"/>
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<div>{{ i18n.ts.nothing }}</div>
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</div>
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</slot>
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</div>
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<div v-else ref="rootEl">
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<div v-show="pagination.reversed && more" key="_more_" class="_margin">
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<MkButton v-if="!moreFetching" v-appear="(enableInfiniteScroll && !props.disableAutoLoad) ? appearFetchMoreAhead : null" :class="$style.more" :disabled="moreFetching" :style="{ cursor: moreFetching ? 'wait' : 'pointer' }" primary rounded @click="fetchMoreAhead">
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{{ i18n.ts.loadMore }}
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</MkButton>
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<MkLoading v-else class="loading"/>
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</div>
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<slot :items="Array.from(items.values())" :fetching="fetching || moreFetching"></slot>
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<div v-show="!pagination.reversed && more" key="_more_" class="_margin">
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<MkButton v-if="!moreFetching" v-appear="(enableInfiniteScroll && !props.disableAutoLoad) ? appearFetchMore : null" :class="$style.more" :disabled="moreFetching" :style="{ cursor: moreFetching ? 'wait' : 'pointer' }" primary rounded @click="fetchMore">
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{{ i18n.ts.loadMore }}
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</MkButton>
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<MkLoading v-else class="loading"/>
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</div>
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</div>
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</Transition>
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</template>
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<script lang="ts">
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import { computed, ComputedRef, isRef, nextTick, onActivated, onBeforeUnmount, onDeactivated, onMounted, ref, watch } from 'vue';
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import * as misskey from 'misskey-js';
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import * as os from '@/os';
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import { onScrollTop, isTopVisible, getBodyScrollHeight, getScrollContainer, onScrollBottom, scrollToBottom, scroll, isBottomVisible } from '@/scripts/scroll';
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import { useDocumentVisibility } from '@/scripts/use-document-visibility';
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import MkButton from '@/components/MkButton.vue';
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import { defaultStore } from '@/store';
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import { MisskeyEntity } from '@/types/date-separated-list';
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import { i18n } from '@/i18n';
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const SECOND_FETCH_LIMIT = 30;
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const TOLERANCE = 16;
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const APPEAR_MINIMUM_INTERVAL = 600;
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export type Paging<E extends keyof misskey.Endpoints = keyof misskey.Endpoints> = {
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endpoint: E;
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limit: number;
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params?: misskey.Endpoints[E]['req'] | ComputedRef<misskey.Endpoints[E]['req']>;
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/**
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* 検索APIのような、ページング不可なエンドポイントを利用する場合
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* (そのようなAPIをこの関数で使うのは若干矛盾してるけど)
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*/
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noPaging?: boolean;
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/**
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* items 配列の中身を逆順にする(新しい方が最後)
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*/
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reversed?: boolean;
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offsetMode?: boolean;
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pageEl?: HTMLElement;
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};
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type MisskeyEntityMap = Map<string, MisskeyEntity>;
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function arrayToEntries(entities: MisskeyEntity[]): [string, MisskeyEntity][] {
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return entities.map(en => [en.id, en]);
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}
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function concatMapWithArray(map: MisskeyEntityMap, entities: MisskeyEntity[]): MisskeyEntityMap {
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return new Map([...map, ...arrayToEntries(entities)]);
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}
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</script>
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<script lang="ts" setup>
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import { infoImageUrl } from '@/instance';
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const props = withDefaults(defineProps<{
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pagination: Paging;
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disableAutoLoad?: boolean;
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displayLimit?: number;
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}>(), {
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displayLimit: 20,
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});
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const emit = defineEmits<{
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(ev: 'queue', count: number): void;
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}>();
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let rootEl = $shallowRef<HTMLElement>();
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// 遡り中かどうか
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let backed = $ref(false);
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let scrollRemove = $ref<(() => void) | null>(null);
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/**
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* 表示するアイテムのソース
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* 最新が0番目
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*/
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const items = ref<MisskeyEntityMap>(new Map());
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/**
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* タブが非アクティブなどの場合に更新を貯めておく
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* 最新が0番目
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*/
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const queue = ref<MisskeyEntityMap>(new Map());
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const offset = ref(0);
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/**
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* 初期化中かどうか（trueならMkLoadingで全て隠す）
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*/
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const fetching = ref(true);
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const moreFetching = ref(false);
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const more = ref(false);
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const preventAppearFetchMore = ref(false);
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const preventAppearFetchMoreTimer = ref<number | null>(null);
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const isBackTop = ref(false);
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const empty = computed(() => items.value.size === 0);
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const error = ref(false);
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const {
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enableInfiniteScroll,
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} = defaultStore.reactiveState;
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const contentEl = $computed(() => props.pagination.pageEl ?? rootEl);
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const scrollableElement = $computed(() => contentEl ? getScrollContainer(contentEl) : document.body);
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const visibility = useDocumentVisibility();
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let isPausingUpdate = false;
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let timerForSetPause: number | null = null;
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const BACKGROUND_PAUSE_WAIT_SEC = 10;
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// 先頭が表示されているかどうかを検出
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// https://qiita.com/mkataigi/items/0154aefd2223ce23398e
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let scrollObserver = $ref<IntersectionObserver>();
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watch([() => props.pagination.reversed, $$(scrollableElement)], () => {
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if (scrollObserver) scrollObserver.disconnect();
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scrollObserver = new IntersectionObserver(entries => {
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backed = entries[0].isIntersecting;
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}, {
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root: scrollableElement,
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rootMargin: props.pagination.reversed ? '-100% 0px 100% 0px' : '100% 0px -100% 0px',
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threshold: 0.01,
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});
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}, { immediate: true });
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watch($$(rootEl), () => {
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scrollObserver?.disconnect();
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nextTick(() => {
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if (rootEl) scrollObserver?.observe(rootEl);
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});
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});
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watch([$$(backed), $$(contentEl)], () => {
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if (!backed) {
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if (!contentEl) return;
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scrollRemove = (props.pagination.reversed ? onScrollBottom : onScrollTop)(contentEl, executeQueue, TOLERANCE);
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} else {
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if (scrollRemove) scrollRemove();
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scrollRemove = null;
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}
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});
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if (props.pagination.params && isRef(props.pagination.params)) {
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watch(props.pagination.params, init, { deep: true });
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}
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watch(queue, (a, b) => {
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if (a.size === 0 && b.size === 0) return;
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emit('queue', queue.value.size);
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}, { deep: true });
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async function init(): Promise<void> {
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items.value = new Map();
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queue.value = new Map();
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fetching.value = true;
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const params = props.pagination.params ? isRef(props.pagination.params) ? props.pagination.params.value : props.pagination.params : {};
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await os.api(props.pagination.endpoint, {
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...params,
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limit: props.pagination.limit ?? 10,
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}).then(res => {
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for (let i = 0; i < res.length; i++) {
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const item = res[i];
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if (i === 3) item._shouldInsertAd_ = true;
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}
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if (res.length === 0 || props.pagination.noPaging) {
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concatItems(res);
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more.value = false;
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} else {
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if (props.pagination.reversed) moreFetching.value = true;
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concatItems(res);
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more.value = true;
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}
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offset.value = res.length;
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error.value = false;
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fetching.value = false;
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}, err => {
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error.value = true;
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fetching.value = false;
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});
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}
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const reload = (): Promise<void> => {
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return init();
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};
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const fetchMore = async (): Promise<void> => {
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if (!more.value || fetching.value || moreFetching.value || items.value.size === 0) return;
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moreFetching.value = true;
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const params = props.pagination.params ? isRef(props.pagination.params) ? props.pagination.params.value : props.pagination.params : {};
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await os.api(props.pagination.endpoint, {
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...params,
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limit: SECOND_FETCH_LIMIT,
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...(props.pagination.offsetMode ? {
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offset: offset.value,
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} : {
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untilId: Array.from(items.value.keys())[items.value.size - 1],
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}),
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}).then(res => {
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for (let i = 0; i < res.length; i++) {
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const item = res[i];
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if (i === 10) item._shouldInsertAd_ = true;
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}
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const reverseConcat = _res => {
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const oldHeight = scrollableElement ? scrollableElement.scrollHeight : getBodyScrollHeight();
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const oldScroll = scrollableElement ? scrollableElement.scrollTop : window.scrollY;
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items.value = concatMapWithArray(items.value, _res);
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return nextTick(() => {
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if (scrollableElement) {
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scroll(scrollableElement, { top: oldScroll + (scrollableElement.scrollHeight - oldHeight), behavior: 'instant' });
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} else {
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window.scroll({ top: oldScroll + (getBodyScrollHeight() - oldHeight), behavior: 'instant' });
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}
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return nextTick();
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});
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};
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if (res.length === 0) {
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if (props.pagination.reversed) {
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reverseConcat(res).then(() => {
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more.value = false;
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moreFetching.value = false;
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});
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} else {
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items.value = concatMapWithArray(items.value, res);
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more.value = false;
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moreFetching.value = false;
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}
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} else {
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if (props.pagination.reversed) {
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reverseConcat(res).then(() => {
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more.value = true;
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moreFetching.value = false;
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});
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} else {
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items.value = concatMapWithArray(items.value, res);
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more.value = true;
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moreFetching.value = false;
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}
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}
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offset.value += res.length;
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}, err => {
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moreFetching.value = false;
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});
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};
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const fetchMoreAhead = async (): Promise<void> => {
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if (!more.value || fetching.value || moreFetching.value || items.value.size === 0) return;
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moreFetching.value = true;
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const params = props.pagination.params ? isRef(props.pagination.params) ? props.pagination.params.value : props.pagination.params : {};
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await os.api(props.pagination.endpoint, {
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...params,
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limit: SECOND_FETCH_LIMIT,
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...(props.pagination.offsetMode ? {
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offset: offset.value,
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} : {
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sinceId: Array.from(items.value.keys())[items.value.size - 1],
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}),
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}).then(res => {
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if (res.length === 0) {
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items.value = concatMapWithArray(items.value, res);
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more.value = false;
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} else {
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items.value = concatMapWithArray(items.value, res);
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more.value = true;
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}
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offset.value += res.length;
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moreFetching.value = false;
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}, err => {
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moreFetching.value = false;
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});
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};
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/**
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* Appear（IntersectionObserver）によってfetchMoreが呼ばれる場合、
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* APPEAR_MINIMUM_INTERVALミリ秒以内に2回fetchMoreが呼ばれるのを防ぐ
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*/
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const fetchMoreApperTimeoutFn = (): void => {
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preventAppearFetchMore.value = false;
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preventAppearFetchMoreTimer.value = null;
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};
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const fetchMoreAppearTimeout = (): void => {
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preventAppearFetchMore.value = true;
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preventAppearFetchMoreTimer.value = window.setTimeout(fetchMoreApperTimeoutFn, APPEAR_MINIMUM_INTERVAL);
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};
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const appearFetchMore = async (): Promise<void> => {
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if (preventAppearFetchMore.value) return;
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await fetchMore();
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fetchMoreAppearTimeout();
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};
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const appearFetchMoreAhead = async (): Promise<void> => {
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if (preventAppearFetchMore.value) return;
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await fetchMoreAhead();
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fetchMoreAppearTimeout();
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};
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const isTop = (): boolean => isBackTop.value || (props.pagination.reversed ? isBottomVisible : isTopVisible)(contentEl!, TOLERANCE);
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watch(visibility, () => {
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if (visibility.value === 'hidden') {
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timerForSetPause = window.setTimeout(() => {
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isPausingUpdate = true;
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timerForSetPause = null;
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},
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BACKGROUND_PAUSE_WAIT_SEC * 1000);
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} else { // 'visible'
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if (timerForSetPause) {
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clearTimeout(timerForSetPause);
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timerForSetPause = null;
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} else {
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isPausingUpdate = false;
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if (isTop()) {
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executeQueue();
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}
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}
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}
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});
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/**
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* 最新のものとして1つだけアイテムを追加する
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* ストリーミングから降ってきたアイテムはこれで追加する
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* @param item アイテム
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*/
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const prepend = (item: MisskeyEntity): void => {
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if (items.value.size === 0) {
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items.value.set(item.id, item);
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fetching.value = false;
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return;
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}
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if (isTop() && !isPausingUpdate) unshiftItems([item]);
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else prependQueue(item);
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};
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/**
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* 新着アイテムをitemsの先頭に追加し、displayLimitを適用する
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* @param newItems 新しいアイテムの配列
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*/
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function unshiftItems(newItems: MisskeyEntity[]) {
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const length = newItems.length + items.value.size;
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items.value = new Map([...arrayToEntries(newItems), ...items.value].slice(0, props.displayLimit));
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if (length >= props.displayLimit) more.value = true;
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}
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/**
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* 古いアイテムをitemsの末尾に追加し、displayLimitを適用する
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* @param oldItems 古いアイテムの配列
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*/
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function concatItems(oldItems: MisskeyEntity[]) {
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const length = oldItems.length + items.value.size;
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items.value = new Map([...items.value, ...arrayToEntries(oldItems)].slice(0, props.displayLimit));
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if (length >= props.displayLimit) more.value = true;
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}
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function executeQueue() {
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unshiftItems(Array.from(queue.value.values()));
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queue.value = new Map();
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}
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function prependQueue(newItem: MisskeyEntity) {
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queue.value = new Map([[newItem.id, newItem], ...queue.value].slice(0, props.displayLimit) as [string, MisskeyEntity][]);
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}
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/*
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* アイテムを末尾に追加する（使うの？）
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*/
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const appendItem = (item: MisskeyEntity): void => {
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items.value.set(item.id, item);
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};
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const removeItem = (id: string) => {
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items.value.delete(id);
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queue.value.delete(id);
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};
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const updateItem = (id: MisskeyEntity['id'], replacer: (old: MisskeyEntity) => MisskeyEntity): void => {
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const item = items.value.get(id);
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if (item) items.value.set(id, replacer(item));
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const queueItem = queue.value.get(id);
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if (queueItem) queue.value.set(id, replacer(queueItem));
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};
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const inited = init();
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onActivated(() => {
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isBackTop.value = false;
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});
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onDeactivated(() => {
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isBackTop.value = props.pagination.reversed ? window.scrollY >= (rootEl ? rootEl.scrollHeight - window.innerHeight : 0) : window.scrollY === 0;
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});
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function toBottom() {
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scrollToBottom(contentEl!);
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}
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onMounted(() => {
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inited.then(() => {
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if (props.pagination.reversed) {
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nextTick(() => {
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setTimeout(toBottom, 800);
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// scrollToBottomでmoreFetchingボタンが画面外まで出るまで
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// more = trueを遅らせる
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setTimeout(() => {
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moreFetching.value = false;
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}, 2000);
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});
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}
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});
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});
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onBeforeUnmount(() => {
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if (timerForSetPause) {
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clearTimeout(timerForSetPause);
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timerForSetPause = null;
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}
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if (preventAppearFetchMoreTimer.value) {
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clearTimeout(preventAppearFetchMoreTimer.value);
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preventAppearFetchMoreTimer.value = null;
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}
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scrollObserver?.disconnect();
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});
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defineExpose({
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items,
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queue,
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backed,
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more,
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inited,
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reload,
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prepend,
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append: appendItem,
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removeItem,
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updateItem,
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});
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</script>
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<style lang="scss" module>
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.transition_fade_enterActive,
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.transition_fade_leaveActive {
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transition: opacity 0.125s ease;
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}
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.transition_fade_enterFrom,
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.transition_fade_leaveTo {
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opacity: 0;
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}
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.more {
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margin-left: auto;
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margin-right: auto;
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}
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</style>
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