mirror of
https://iceshrimp.dev/iceshrimp/iceshrimp
synced 2024-12-21 01:58:10 +09:00
d2ca085a17
* fix: emits use ev instead of e * fix: errors use err instead of e * fix: replace use of data where possible * fix: events use evt instead of e * fix: use strict equals * fix: use emoji instead of e * fix: vue lints
311 lines
8.8 KiB
Vue
311 lines
8.8 KiB
Vue
<template>
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<transition :name="$store.state.animation ? 'fade' : ''" mode="out-in">
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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="https://xn--931a.moe/assets/info.jpg" class="_ghost"/>
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<div>{{ $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="cxiknjgy _gap">
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<MkButton v-if="!moreFetching" class="button" :disabled="moreFetching" :style="{ cursor: moreFetching ? 'wait' : 'pointer' }" primary @click="fetchMoreAhead">
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{{ $ts.loadMore }}
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</MkButton>
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<MkLoading v-else class="loading"/>
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</div>
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<slot :items="items"></slot>
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<div v-show="!pagination.reversed && more" key="_more_" class="cxiknjgy _gap">
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<MkButton v-if="!moreFetching" v-appear="($store.state.enableInfiniteScroll && !disableAutoLoad) ? fetchMore : null" class="button" :disabled="moreFetching" :style="{ cursor: moreFetching ? 'wait' : 'pointer' }" primary @click="fetchMore">
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{{ $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" setup>
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import { computed, ComputedRef, isRef, markRaw, onActivated, onDeactivated, Ref, 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, getScrollPosition, getScrollContainer } from '@/scripts/scroll';
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import MkButton from '@/components/ui/button.vue';
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const SECOND_FETCH_LIMIT = 30;
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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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};
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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: 30,
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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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type Item = { id: string; [another: string]: unknown; };
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const rootEl = ref<HTMLElement>();
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const items = ref<Item[]>([]);
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const queue = ref<Item[]>([]);
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const offset = ref(0);
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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 backed = ref(false); // 遡り中か否か
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const isBackTop = ref(false);
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const empty = computed(() => items.value.length === 0);
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const error = ref(false);
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const init = async (): Promise<void> => {
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queue.value = [];
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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.noPaging ? (props.pagination.limit || 10) : (props.pagination.limit || 10) + 1,
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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 (props.pagination.reversed) {
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if (i === res.length - 2) item._shouldInsertAd_ = true;
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} else {
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if (i === 3) item._shouldInsertAd_ = true;
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}
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}
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if (!props.pagination.noPaging && (res.length > (props.pagination.limit || 10))) {
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res.pop();
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items.value = props.pagination.reversed ? [...res].reverse() : res;
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more.value = true;
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} else {
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items.value = props.pagination.reversed ? [...res].reverse() : res;
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more.value = false;
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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 = (): void => {
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items.value = [];
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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.length === 0) return;
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moreFetching.value = true;
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backed.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 + 1,
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...(props.pagination.offsetMode ? {
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offset: offset.value,
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} : {
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untilId: props.pagination.reversed ? items.value[0].id : items.value[items.value.length - 1].id,
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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 (props.pagination.reversed) {
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if (i === res.length - 9) item._shouldInsertAd_ = true;
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} else {
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if (i === 10) item._shouldInsertAd_ = true;
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}
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}
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if (res.length > SECOND_FETCH_LIMIT) {
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res.pop();
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items.value = props.pagination.reversed ? [...res].reverse().concat(items.value) : items.value.concat(res);
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more.value = true;
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} else {
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items.value = props.pagination.reversed ? [...res].reverse().concat(items.value) : items.value.concat(res);
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more.value = false;
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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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const fetchMoreAhead = async (): Promise<void> => {
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if (!more.value || fetching.value || moreFetching.value || items.value.length === 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 + 1,
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...(props.pagination.offsetMode ? {
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offset: offset.value,
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} : {
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sinceId: props.pagination.reversed ? items.value[0].id : items.value[items.value.length - 1].id,
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}),
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}).then(res => {
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if (res.length > SECOND_FETCH_LIMIT) {
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res.pop();
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items.value = props.pagination.reversed ? [...res].reverse().concat(items.value) : items.value.concat(res);
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more.value = true;
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} else {
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items.value = props.pagination.reversed ? [...res].reverse().concat(items.value) : items.value.concat(res);
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more.value = false;
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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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const prepend = (item: Item): void => {
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if (props.pagination.reversed) {
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if (rootEl.value) {
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const container = getScrollContainer(rootEl.value);
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if (container == null) return; // TODO?
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const pos = getScrollPosition(rootEl.value);
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const viewHeight = container.clientHeight;
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const height = container.scrollHeight;
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const isBottom = (pos + viewHeight > height - 32);
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if (isBottom) {
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// オーバーフローしたら古いアイテムは捨てる
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if (items.value.length >= props.displayLimit) {
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// このやり方だとVue 3.2以降アニメーションが動かなくなる
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//items.value = items.value.slice(-props.displayLimit);
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while (items.value.length >= props.displayLimit) {
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items.value.shift();
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}
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more.value = true;
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}
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}
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}
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items.value.push(item);
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// TODO
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} else {
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// 初回表示時はunshiftだけでOK
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if (!rootEl.value) {
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items.value.unshift(item);
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return;
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}
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const isTop = isBackTop.value || (document.body.contains(rootEl.value) && isTopVisible(rootEl.value));
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if (isTop) {
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// Prepend the item
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items.value.unshift(item);
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// オーバーフローしたら古いアイテムは捨てる
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if (items.value.length >= props.displayLimit) {
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// このやり方だとVue 3.2以降アニメーションが動かなくなる
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//this.items = items.value.slice(0, props.displayLimit);
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while (items.value.length >= props.displayLimit) {
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items.value.pop();
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}
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more.value = true;
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}
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} else {
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queue.value.push(item);
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onScrollTop(rootEl.value, () => {
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for (const item of queue.value) {
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prepend(item);
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}
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queue.value = [];
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});
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}
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}
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};
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const append = (item: Item): void => {
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items.value.push(item);
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};
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const removeItem = (finder: (item: Item) => boolean) => {
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const i = items.value.findIndex(finder);
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items.value.splice(i, 1);
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};
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const updateItem = (id: Item['id'], replacer: (old: Item) => Item): void => {
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const i = items.value.findIndex(item => item.id === id);
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items.value[i] = replacer(items.value[i]);
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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.length === 0 && b.length === 0) return;
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emit('queue', queue.value.length);
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}, { deep: true });
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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 = window.scrollY === 0;
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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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reload,
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prepend,
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append,
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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" scoped>
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.fade-enter-active,
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.fade-leave-active {
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transition: opacity 0.125s ease;
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}
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.fade-enter-from,
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.fade-leave-to {
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opacity: 0;
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}
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.cxiknjgy {
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> .button {
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margin-left: auto;
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margin-right: auto;
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}
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}
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</style>
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